When buying a rotary evaporator, all the issues you care about are here...

When buying a rotary evaporator, all the issues you care about are here...

It is understood that there are many types of rotary evaporator equipment on the market now, and there are many identical products because the competition between enterprises is very fierce. However, due to the large number of products, some customers will be at a loss when purchasing. The rotary evaporator can rotate under constant temperature heating and negative pressure conditions to form a thin film, and then evaporate the solvent for condensation and recovery. It is particularly suitable for the concentration, crystallization, separation, and recovery of heat-sensitive materials. It is an important equipment for scientific research, pilot testing, and production in the biopharmaceutical, chemical, and food industries. Industry professionals can say that when buying a rotary evaporator, as long as we grasp the important skills, it will be much more convenient for us to choose and buy. Next, we will talk about the issues that customers care about when buying an evaporator.

What are the important performance indicators?

The first important thing about the rotary evaporator is the airtightness of the instrument, which is related to whether the instrument can be used normally and the service life of the instrument. The quality of airtightness is related to the design level, manufacturing level, and materials used in different industries. It can be measured by "achievable vacuum degree" and "vacuum pressure holding time".

Does the power of the bath affect the evaporation rate?

The power of the bath has a great influence on the evaporation rate, especially for substances with large latent heat of evaporation (such as water). When vaporizing, they need to absorb a lot of heat energy, and the fastest evaporation rate is almost proportional to the heating power.

What is the difference between glass lifting and bath vortex lifting?

Relatively speaking, bath lifting is safer and glass is not easy to break. Moreover, the bath does not need to be locked after lifting, so the operation is more convenient than glass lifting.

Is there any way to save energy for large rotary evaporators?

The power of the 50L instrument bath is 9KW, and the power of the 20L instrument bath is 5KW. When multiple units are used together, power supply often becomes a problem. Matching steam heating device is an effective solution for energy saving.

Is the electric lifting function important?

It is very important. It is a function that adds icing on the cake. Considering the cost-effectiveness, safety, failure rate and other aspects, most people choose manual lifting, and those with explosion-proof requirements almost do not consider electric lifting.

What to do when the tap water temperature is not low enough to condense?

In summer, the tap water temperature is close to 30-40 degrees, and it is almost impossible to recover the solvent with a steam temperature below 30 degrees. In this case, there are three solutions to choose from.

Among them, the best solution is to select a low-temperature cooling water circulation pump with matching cooling capacity. When selecting compensation, pay attention to the fact that "cooling capacity" is more important than "low temperature"; small machines (5L or less) can be equipped with "cold traps" for cooling, which costs less but requires manual ice addition; "reducing the vacuum degree and increasing the steam temperature" at the expense of sacrificing the evaporation rate when the bath temperature remains unchanged.